AQA GCSE Chemistry / Trilogy Using resources H

River water is filtered then sterilised to make drinking water. Why is it filtered?

• kills bacteria
• removes solids
• removes dissolved salts
• adds chlorine
• removes germs

River water is filtered then sterilised to make drinking water. Why is it sterilised?

• kills bacteria
• removes solids
• removes dissolved salts
• adds chlorine
• removes germs

Why is distilling sea water to make drinking water expensive?

• uses a lot of chemicals
• it's slow
• needs expensive equipment
• takes lots of time
• takes a lot of energy

How is distilled water different to sea water?

• it's a mixture
• it's a formulation
• it boils at 100 degrees C
• it freezes over a range of temperatures
• it is more salty

Which of these methods is not used for sterilising water?

• UV
• chlorine
• ozone
• boiling
• filtering

How does UV sterilise water?

• mutates DNA to stop replication
• produces chlorine
• gets rid of salt
• filters out solids

What does LCA stand for?

• Live cycle assignment
• Life cycle assignment
• Life circle assessment
• Life cycle assessment
• Live cycle assessment

What does a LCA assess?

• the carbon footprint
• the energy needed for a process
• the pollution
• the sustainability of a product
• the environmental impact of a product

5.1 kg of plastic has a carbon footprint of 7.0 kg CO2. What is the carbon footprint of a 25g bottle?

• 0.043
• 0.034
• 0.018
• 34.3
• 18.2

Give one way that CO2 emissions can be reduced when manufacturing a plastic bottle?

• use recycled plastic
• recycle the bottle
• use thicker plastic
• burn it afterwards
• sell it locally